Shared Sort allocated w/o intra-partition parallelism OR connection concentrator

Hello DB2 friends, I have an odd mystery I'm hoping someone can enlighten me on.

I have a DB2 LUW 9.1 ESE database running on Linux Suse 10. I'm trying to learn all about DB2's memory model, but I can't figure out how/why shared sort heap is being allocated in the database global memory.

In my dbm cfg, (INTRA_PARALLEL) = NO & my MAX_CONNECTIONS is equal to MAX_COORDAGENTS.

When I read this Memory allocation in DB2
it makes me think shared sort heap should not be part of the database global memory. What am I missing?

Here's the output from the memory tracker:

dbiecs1p@MGPDB2L01:~> db2mtrk -d -i -v
Tracking Memory on: 2013/04/29 at 16:05:01

Memory for instance

Database Monitor Heap is of size 1638400 bytes
Other Memory is of size 30146560 bytes
Total: 31784960 bytes

Memory for database: ECDWF01P

Backup/Restore/Util Heap is of size 327680 bytes
Package Cache is of size 42336256 bytes
Catalog Cache Heap is of size 1769472 bytes
Buffer Pool Heap (9) is of size 33292288 bytes
Buffer Pool Heap (8) is of size 33423360 bytes
Buffer Pool Heap (7) is of size 4653056 bytes
Buffer Pool Heap (6) is of size 16908288 bytes
Buffer Pool Heap (5) is of size 6750208 bytes
Buffer Pool Heap (4) is of size 16908288 bytes
Buffer Pool Heap (3) is of size 4653056 bytes
Buffer Pool Heap (2) is of size 16908288 bytes
Buffer Pool Heap (1) is of size 34406400 bytes
Buffer Pool Heap (System 32k buffer pool) is of size 917504 bytes
Buffer Pool Heap (System 16k buffer pool) is of size 655360 bytes
Buffer Pool Heap (System 8k buffer pool) is of size 524288 bytes
Buffer Pool Heap (System 4k buffer pool) is of size 458752 bytes
Shared Sort Heap is of size 2424832 bytes
Lock Manager Heap is of size 1703936 bytes
Database Heap is of size 19136512 bytes
Other Memory is of size 458752 bytes
Total: 238616576 bytes


Here's my dbm cfg:


Database Manager Configuration

Node type = Enterprise Server Edition with local and remote clients

Database manager configuration release level = 0x0b00

CPU speed (millisec/instruction) (CPUSPEED) = 2.479807e-07
Communications bandwidth (MB/sec) (COMM_BANDWIDTH) = 1.000000e+02

Max number of concurrently active databases (NUMDB) = 8
Federated Database System Support (FEDERATED) = YES
Transaction processor monitor name (TP_MON_NAME) =

Default charge-back account (DFT_ACCOUNT_STR) =

Java Development Kit installation path (JDK_PATH) = /home/dbiecs1p/sqllib/java/jdk64

Diagnostic error capture level (DIAGLEVEL) = 3
Notify Level (NOTIFYLEVEL) = 3
Diagnostic data directory path (DIAGPATH) = /home/dbiecs1p/sqllib/db2dump

Default database monitor switches
Buffer pool (DFT_MON_BUFPOOL) = ON
Lock (DFT_MON_LOCK) = ON
Sort (DFT_MON_SORT) = ON
Statement (DFT_MON_STMT) = ON
Table (DFT_MON_TABLE) = ON
Timestamp (DFT_MON_TIMESTAMP) = ON
Unit of work (DFT_MON_UOW) = ON
Monitor health of instance and databases (HEALTH_MON) = ON

SYSADM group name (SYSADM_GROUP) = DB2GRP1
SYSCTRL group name (SYSCTRL_GROUP) =
SYSMAINT group name (SYSMAINT_GROUP) =
SYSMON group name (SYSMON_GROUP) =

Client Userid-Password Plugin (CLNT_PW_PLUGIN) =
Client Kerberos Plugin (CLNT_KRB_PLUGIN) =
Group Plugin (GROUP_PLUGIN) =
GSS Plugin for Local Authorization (LOCAL_GSSPLUGIN) =
Server Plugin Mode (SRV_PLUGIN_MODE) = UNFENCED
Server List of GSS Plugins (SRVCON_GSSPLUGIN_LIST) =
Server Userid-Password Plugin (SRVCON_PW_PLUGIN) =
Server Connection Authentication (SRVCON_AUTH) = NOT_SPECIFIED
Database manager authentication (AUTHENTICATION) = SERVER
Cataloging allowed without authority (CATALOG_NOAUTH) = NO
Trust all clients (TRUST_ALLCLNTS) = YES
Trusted client authentication (TRUST_CLNTAUTH) = CLIENT
Bypass federated authentication (FED_NOAUTH) = NO

Default database path (DFTDBPATH) = /home

Database monitor heap size (4KB) (MON_HEAP_SZ) = 1024
Java Virtual Machine heap size (4KB) (JAVA_HEAP_SZ) = 2048
Audit buffer size (4KB) (AUDIT_BUF_SZ) = 0
Size of instance shared memory (4KB) (INSTANCE_MEMORY) = AUTOMATIC
Backup buffer default size (4KB) (BACKBUFSZ) = 1024
Restore buffer default size (4KB) (RESTBUFSZ) = 1024

Sort heap threshold (4KB) (SHEAPTHRES) = 0

Directory cache support (DIR_CACHE) = YES

Application support layer heap size (4KB) (ASLHEAPSZ) = 15
Max requester I/O block size (bytes) (RQRIOBLK) = 32767
Query heap size (4KB) (QUERY_HEAP_SZ) = 1000

Workload impact by throttled utilities(UTIL_IMPACT_LIM) = 10

Priority of agents (AGENTPRI) = SYSTEM
Max number of existing agents (MAXAGENTS) = 1250
Agent pool size (NUM_POOLAGENTS) = 625(calculated)
Initial number of agents in pool (NUM_INITAGENTS) = 0
Max number of coordinating agents (MAX_COORDAGENTS) = MAXAGENTS
Max no. of concurrent coordinating agents (MAXCAGENTS) = MAX_COORDAGENTS
Max number of client connections (MAX_CONNECTIONS) = MAX_COORDAGENTS
Keep fenced process (KEEPFENCED) = YES
Number of pooled fenced processes (FENCED_POOL) = MAX_COORDAGENTS
Initial number of fenced processes (NUM_INITFENCED) = 0

Index re-creation time and redo index build (INDEXREC) = RESTART

Transaction manager database name (TM_DATABASE) = 1ST_CONN
Transaction resync interval (sec) (RESYNC_INTERVAL) = 180

SPM name (SPM_NAME) =
SPM log size (SPM_LOG_FILE_SZ) = 256
SPM resync agent limit (SPM_MAX_RESYNC) = 20
SPM log path (SPM_LOG_PATH) =

TCP/IP Service name (SVCENAME) = db2c_dbiecs1p
Discovery mode (DISCOVER) = SEARCH
Discover server instance (DISCOVER_INST) = ENABLE

Maximum query degree of parallelism (MAX_QUERYDEGREE) = ANY
Enable intra-partition parallelism (INTRA_PARALLEL) = NO
Maximum Asynchronous TQs per query (FEDERATED_ASYNC) = 0

No. of int. communication buffers(4KB)(FCM_NUM_BUFFERS) = AUTOMATIC
No. of int. communication channels (FCM_NUM_CHANNELS) = AUTOMATIC
Node connection elapse time (sec) (CONN_ELAPSE) = 10
Max number of node connection retries (MAX_CONNRETRIES) = 5
Max time difference between nodes (min) (MAX_TIME_DIFF) = 60

db2start/db2stop timeout (min) (START_STOP_TIME) = 10

Any help, thought or suggestions are welcome! Thanks!